16/20MM Watch Screw Tube Pin With Tool For Guess Collection GC Chronograph WatchFeatures:1. For Guess Series GC Chronograph.2. Tube length 16MM, inner diameter length about 15.5MM, stem thickness about 1.5MM.3. Tube length 20MM, inner diameter length about 19.5MM, stem thickness about 1.7MM.4. The product comes with tools for your easy installation.Package Includes:2*Connecting rod1*toolNote:1. Please allow 1-3 mm error due to manual measurement. Please make sure you don't mind before ordering.2. Please allow 1-3g weight error. Please make sure you don't mind before ordering.3. Due to the lighting of the photos and the difference of monitors, the pictures may not reflect the actual color of the real item. Please make sure you don't mind before ordering, thank you!